All depends on whether your island has five, four, or two doors....just kidding..
Never had to replace one but should be pretty much straight forward. Dealer only item (though some of the first line would make sense as in, if you have the almond or white laminate. Hopefully its not too bad where you can't still use your camper (or fashion some make shift door to keep the water out). Dealer turn around time for parts tend to be very long. When it does come in, you can ask them what they would use to seal/caulk around the door when installing it.